Spring-frog



(No Model.)

D. H. LOVELL.

SPRING FROG.

No. 338,177. Patented Mar. 16, 13 6,

ATTORNEYS.

N. PEYERS, Photo-Lithographer. Wahinglnn. D C

UNITED STATES PATENT OFFICE.

"DAvID HENRY LOVELL, OF nnnovo, PENNSYLVANIA.

SPRING-FROG.

SPECIPICATIQN forming part of Letters Patent No. 338,177, dated March16, 1886.

Application filed December 9, 1885. Serial No. 185,147. (No model.)

To all whom it may concern:

Be it known that I, DAVID HENRY LOVELL, of Renovo, in the county ofClinton and State of Pennsylvania, have invented a new and ImprovedSpring-Frog, of which the following is a full, clear, and exactdescription.

This invention relates to certain new and useful improvements in thatclass of railroadfrogs constructed with a spring-rail, which can beforced outwardly by the flange of the wheel of the passing locomotive orcars.

The object of my invention is to prevent the breaking of the spring-railby badly-worn wheels.

The invention consists in the construction and arrangement of parts, aswill be hereinafter fully described andelaimed.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a plan view of my improved spring-frog. Fig. 2 is a sideview of the same. Fig. 3 is a cross-sectional view on the liner 00,Fig. 1. Fig. 4. is a cross-sectional View on the line 3 Fig. 1. Fig. 5is a cross-sectional view on the line 2 z, Fig. 1. V Fig. 6 is acrosssectional view on the line to 20, Fig. 1.

In my improved frog, A is the spring-rail, B the siding-rail, and C themain-track rail. 1? is the point of the frog. D is the wing and othersiding rail.

The main-line rail 0 and the Wingrail Dare of the ordinary height; butthe tops of the siding-rail B and the spring-rail A are about one-fourthof an inch lower than the tops of said main-line and wing rails, and thepoint P is beveled lengthwise and. laterally at its top from its pointedend, the said pointed end being as high as the spring-rail, as is shownin the section Fig. 5.

The total length of the spring-frog is usually about fifteen feet, thespring-rail part being usually about eleven feet long; but I do notlimit myself to anything in the construction of the spring-frog, as itmay be constructed of any suitable length, having a spiral, bow, rubber,or any other suitable spring acting 011 the movable rail, and theseveral parts forming the frog maybe secured on or to a plate ordirectly on the sleepers or cross-ties by any of the various methods ofclamps or bolts.

My improvement can be applied on all kinds of frogs in use at present,all that is necessary being to reduce the height of the siding andspring rails, or the equivalent of the springrail, and to bevel thepoint I in the manner set forth.

The rails forming the frog may have any desired cross-section and anydesired height and weight per foot; but in all cases the sid--spring-rail A, the whole bearing of the wheel" then being upon aninsecure and movable rail, and consequently increasing the liability ofsaid rail to break, or, if the part a fails to mount the spring-rail atm, it forces it open or away from the sidingrail B and breaks it.

If the spring-rail A and the siding-rail B are lower than the main-linerail 0, the hearing of the worn part of the wheel-tread will be where itshould beviz., upon the rail O and the part a of the wheel will barely,if at all, touch the siding-rail B or the spring-rail A at m, as thewheel readily runs from the higher main-track rail,0,to the lowerspringrail, A, the beveled point P making the change gradual.

I am aware that the upper bearing-surface of the siding rail leading tothe frog has been cut away at its juncture with the main rail in linesparallel to said main rail, the remaining part of the siding rail beingof the same height as the main rail, and I do not claim the same as ofmy invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A railway spring-frog having the top of too its spring-railthroughout its entire length a short distance below the top of themain-line rail, substantially as herein shown and de- 8. A railwayspring-frog having the top of scribed. the siding-rail and of thespring-rail a short 2. The combination of the main rail 0 and distancebelow the top of the main-line rail the Wing and siding rail D, of equalheight, and having the fr0g-point beveled, substa.n

5 g vithlthe othfier sicilling-railfhailving its to (sjurtially asherein shown and described.

ace ower t an t e top 0 t e main rai at A T I its juncture therewith,and the spring-rail A, DAVID HE} RY LOVDLL' made lower throughout itsentire length than WVitnesses:

the main and wing rails O and D substantially P. H. MULVII-IILL,

o as set forth. Jos. R. KENDIG.

